Articles tagged with Astrocytes
Researchers found specialized astrocytes in mouse brains that can repopulate damaged areas and rebuild cells. These 'regenerative' astrocytes send newly formed cell nuclei to the site of injury, knitting the network back together.
A study found that brain immune cells undergo substantial remodeling in midlife, leading to chronic neuroinflammation and potential dementia risk. The research used advanced single-cell analysis techniques to analyze postmortem hippocampal tissue from 40 healthy adults.
Researchers developed a human-safe drug that repairs DNA breaks and reduces inflammation in a mouse model of Alzheimer's disease. The approach targets multiple disease-relevant cellular pathways, providing a broader therapeutic strategy than previous approaches focused on individual disease hallmarks.
Scientists at King's College London have developed a human-safe drug that repairs DNA breaks and reduces inflammation in a mouse model of Alzheimer's disease. This approach targets multiple features of the disease simultaneously, providing a broader therapeutic strategy than previous approaches focused on individual disease hallmarks.
Researchers discovered astrocytes actively preserve long-term memories by regulating Ank2 and BDNF signaling. This finding expands the understanding of how memories are stored in the brain.
A team of neurobiologists has developed a method to visualize individual cells' sodium content in brain tissue, revealing differences between and within astrocyte sub-units. These findings suggest that astrocytes are not uniform in their function and may play a role in various brain disorders.
Researchers uncover role of glia in ALS pathogenesis, finding altered functioning of TDP-43 protein and MYC factor responsible for abnormality. The study provides new anchors to understand clinical heterogeneity of ALS and suggests potential biomarkers for diagnosis and monitoring.
Researchers discovered that strokes cause a chain reaction within the brain, leading to neuronal cell death. They found that blocking collagen production can prevent this damage and even restore motor function in paralyzed monkeys. The new drug KDS12025 reduces hydrogen peroxide levels and prevents the entire process from being triggered.
Researchers from the Salk Institute found that astrocytes play a crucial role in fragile X syndrome symptoms. Correcting dysregulations in star-shaped brain cells improved some symptoms, including reduced seizures and restored molecular balances in a mouse model of FXS. The study validates the importance of studying astrocytes in FXS r...
A new study reveals that astrocytes build far-reaching connections to communicate with other cells across the brain. These pathways appear to connect distant regions in ways that had not been mapped before, adding a new layer to how brain regions stay connected.
Researchers develop molecular tool called SynTrogo, which enables selective dismantling of synaptic connections in brain circuits. By harnessing astrocytes, the system reduces synapse number while strengthening remaining connections, leading to enhanced long-term potentiation and improved memory.
A new study reveals that astrocytes regulate inhibitory signaling in the cerebellum during development, enabling the emergence of flexible and precise motor coordination. In contrast, younger animals rely on neuron-derived tonic inhibition, which is replaced by astrocyte-derived tonic inhibition in late adolescence.
A new study reveals that astrocytes actively participate in motor-learning circuit rewiring by eliminating synapses in the striatum. The research identifies MEGF10 as a key molecular mediator of this process, which is regulated by dopamine signaling and neural activity.
A new study has found that astrocytes are crucial for aversive memory, including learning what to fear and recalling memories. The findings challenge long-held assumptions about fear memory and suggest new treatment approaches for disorders like post-traumatic stress disorder.
Mitochondrial dysfunction acts as a pathogenic hub linking genetic mutations, environmental toxins, and age-related decline. Aging exacerbates these defects, leading to neuronal loss and progressive disease progression. The review highlights therapeutic opportunities targeting mitochondrial quality control and neuroinflammatory signaling.
Researchers have identified DNA switches that control how brain cells called astrocytes work, which are known to play a role in Alzheimer's disease. The study used CRISPRi technology and single-cell RNA sequencing to test nearly 1000 potential switches, finding that about 150 of them controlled genes implicated in Alzheimer's disease.
Scientists at Salk Institute find protein CCN1, secreted by astrocytes, maintains stable neural circuits in adult brains. The discovery could lead to new therapeutics for brain injury and stroke.
Researchers found that a protein involved in ATP release, connexin 43, plays a key role in depressive- and anxiety-like behaviors. Restoring connexin 43 in the hippocampus improved behavioral outcomes and boosted ATP levels in stressed mice.
Researchers from UT Health San Antonio discovered that changes in brain fats play a major role in Alzheimer's development and progression. Targeting microglia, the brain's immune cells, may help restore balance and support brain health. Progranulin levels also emerged as a key lipid regulator.
Alzheimer's disease disrupts the daily activity patterns of brain cells involved in removing amyloid plaques, suggesting a potential therapeutic target for treating the disease. Controlling these circadian rhythms could help prevent disease progression.
Graz University of Technology and the University of Regensburg are conducting research on the interaction of cell types at the blood-brain barrier, with a particular focus on sex-specific differences in depression. The study aims to identify mechanisms contributing to depression and develop targeted therapies.
A new study reveals that astrocytes, a type of glial cell, are responsible for stabilizing memories through repeated engagement. The researchers found that Fos activity in astrocytes only occurs during recall, and that these cells can be activated to produce stable memories.
Researchers have discovered that astrocytes can integrate signals from several neurons at once, achieving a new level of spatial and temporal integration. This allows astrocytes to coordinate broader responses and enables new cognitive functions.
Researchers found that an astrocytic 'brake' mechanism, fueled by the neurotransmitter GABA, blocks spinal cord repair after injury. Inhibiting this pathway with the MAOB inhibitor KDS2010 enables recovery of spinal cord function in animal models.
Astrocytes, a type of brain cell, are sensitive to early-life stress and affect physical activity levels in mice. This study found that astrocyte morphology changes can be a marker of dysfunction and may contribute to the development of depression in humans.
Research reveals neuroglia play active role in brain function, driving disease progression through atrophy and functional decline. Therapeutic strategies targeting neuroglial signaling may prevent damage following brain injury or protect against neurodegenerative processes.
Researchers have reimagined hemoglobin as an antioxidant protein in the brain, where it breaks down harmful reactive oxygen species. A new compound, KDS12025, selectively enhances this natural defense mechanism to protect against ALS, Parkinson's, Alzheimer's, and autoimmune disorders.
Researchers at the Institute for Basic Science have discovered that excessive GABA produced by astrocytes impairs fear extinction in PTSD. A new brain-permeable drug called KDS2010 has reversed PTSD-like symptoms in mice, providing a promising therapeutic approach.
Researchers found that astrocytes maintain optimal levels of GABA to enable neural groups to process visual information efficiently. Knocking out Gat3 in mice impaired neuron coordination and reduced ensemble activity, highlighting the importance of astrocytic regulation.
Researchers discovered a two-step mechanism where inhibitory neurons release nitric oxide to rapidly dilate blood vessels, followed by slower, localized vasodilation via astrocyte activation. This breakthrough sheds light on how neural signals are translated into blood volume changes in brain imaging.
A recent study using machine learning and computational modeling reveals that astrocytes play a more active role in brain function than previously thought. Astrocytes subtly modulate communication between neurons during synchronous brain activity, influencing network coordination and stability.
Astrocytes, long-neglected brain cells, are found to modulate behavioral flexibility and whole-body metabolism in mice with obesity. Researchers from CNRS and Université Paris Cité discovered that manipulating astrocytes in vivo can correct cognitive changes and influence metabolism.
A UC Riverside study found that Toxoplasma gondii can significantly disrupt brain function by interfering with communication between brain cells. Infected neurons release fewer extracellular vesicles, which can lead to seizures, neural damage, or altered brain connectivity.
MIT researchers developed a new hypothesis for how astrocytes contribute to memory storage, proposing that they encode memories through gradual changes in calcium flow patterns. This information is conveyed to neurons via gliotransmitters released at synapses connected to astrocyte processes.
Researchers discovered a novel mechanism by which glioblastoma cells exploit astrocytes to evade immune responses. The study highlights an astrocyte-driven mechanism used by GBM to escape protective immune responses and could guide novel immunotherapies for the treatment of this aggressive brain cancer.
Astrocytes, once thought to be supporting cells, are active players in neuromodulation, controlling neuronal activity and behavior. The discovery of a biochemical circuit involving ATP and adenosine reveals a slower time scale for modulation compared to neural circuits.
Researchers found that a brain chemical associated with alertness and learning alters brain connectivity by signaling through astrocytes, rather than directly on neurons. This discovery calls for greater focus on astrocytes as therapeutic targets in the treatment of attention, memory, and emotional disorders.
Brazilian researchers found that hevin, a glycoprotein produced by astrocytes, increases connections between neurons and improves cognitive function in aged rodents. The study provides insight into the role of astrocytes in Alzheimer's disease and offers potential new treatment strategies.
Researchers at Linköping University developed a miniaturized iontronic micropipette to precisely modulate neuronal and astrocytic activity. The study revealed dynamic dynamics between cells, highlighting the importance of chemical signaling in brain function.
A team of researchers used machine learning to analyze changes in astrocyte cells' structure, shedding light on heroin addiction and relapse. The study, published in Science Advances, found that specific subpopulations of astroglia exhibit more pronounced morphological changes during drug use.
Researchers found that SIRT2, a previously unknown enzyme, plays a key role in excessive GABA production associated with Alzheimer's disease. This process leads to brain inflammation and memory impairment. By targeting SIRT2, scientists can selectively block its harmful effects on memory without affecting other brain functions.
A study published by Tohoku University reveals that epileptic seizures can significantly reduce ATP levels in neurons, while increasing pyruvate levels in astrocytes. This finding challenges the traditional view of brain energy dynamics and suggests a more complex interplay between neuronal activity and metabolic processes.
Researchers at Helmholtz Munich identified distinct subtypes of white matter astrocytes, including one that can multiply and support brain repair. These findings raise possibilities for regenerative medicine and therapies for brain injuries and neurodegenerative diseases.
A University of Oklahoma researcher is exploring alternate strategies for identifying and targeting Alzheimer's and related diseases using a $2.2 million federal grant. The study aims to understand the mechanisms linking aging to cognitive decline, potentially leading to new treatments for dementia.
Researchers discovered ependymal cells have limited proliferative capacity after spinal cord injury, whereas astrocytes can transdifferentiate into oligodendrocytes to promote remyelination. Material transplantation enhances astrocyte-mediated repair, offering a promising approach for future SCI therapies.
Researchers used zebrafish to test ketamine's effects on depression, revealing that the drug suppresses 'giving up' behavior by overstimulating astroglia cells. This finding suggests a potential new approach for treating depression by targeting these non-neuronal cells.
A research team led by Prof. Lee Hyo-sang of DGIST has discovered that astrocytes play a crucial role in regulating stress responses in the lateral septum of the brain. This finding may lead to the development of new treatments for anxiety and depression.
A study from Tohoku University reveals that astrocytic manipulation affects the fate of long-term memory, with acidifying astrocytes preventing memories from being remembered and alkalinizing astrocytes preserving them. The findings suggest a parallel process of short-term and long-term memory formation.
A study published in Nature reveals that astrocytes, star-shaped brain cells, play a crucial role in storing and retrieving memories. Researchers found that these non-neuronal cell types work closely with groups of neurons called engrams to regulate the formation and recall of memories.
Chronic neuroinflammation, driven by activated microglia and astrocytes, is a hallmark of neurodegenerative diseases. Targeted therapies that modulate microglial and astrocytic activity show promise in mitigating neuroinflammation.
Researchers at CNIO propose a new treatment for brain metastasis by targeting pro-tumour astrocytes with immunotherapy. They identified TIMP1 as a biomarker to predict when immunotherapy is effective, and a clinical trial is underway to test the therapeutic efficacy of silibinin inhibition.
Scientists have discovered that epigenetic changes can reprogram astrocytes into brain stem cells, which can potentially be used to replace damaged nerve cells in regenerative medicine. This breakthrough is made possible by the methylation of genetic material, allowing these special astrocytes to acquire stem cell properties.
Researchers at University of Córdoba identify a new molecular pathway modulating astrocytes and kisspeptin activity to regulate reproductive functions. The study reveals the role of diet in modulating reproductive alterations associated with obesity.
Scientists successfully mapped transcriptomes from 1.3 million brain cortex cells to gain molecular insights into Alzheimer's vulnerability and resilience. The resulting atlas holds promise for gene and molecular discovery across pathways affecting brain health.
Researchers from Jilin University provide a comprehensive overview of brain injury biomarkers, including neuron-specific enolase, ubiquitin C-terminal hydrolase-L1, and neurofilament proteins. These biomarkers can help identify brain injuries and predict disease progression.
Researchers have identified a cellular mechanism that detects when the brain needs an extra energy boost to support its activity. This discovery could lead to new therapies for maintaining brain health and longevity by targeting impaired brain energy metabolism, a process accelerated in ageing and neurodegenerative diseases.
Researchers found that increasing astrocytic mGluR3 levels enhanced memory in older females, while reducing these levels impaired memory in young females. In males, reducing mGluR3 enhanced memory, and increasing the receptor had no effects.
Researchers developed a novel light-sensitive drug that enhances extracellular adenosine activity, inducing sleep artificially without genetic modification. The drug overcomes issues with conventional photosensitive drugs, showcasing optochemistry's potential in targeting A2A receptors and regulating brain function.
Astrocyte activity starts approximately 20 seconds before epileptic neuronal hyperactivity, suggesting their role in triggering seizures. Researchers found that blocking metabolic activity of astrocytes reduces the magnitude of epileptic neuronal hyperactivity.
Researchers at University of Pittsburgh are developing a platform to genetically modify glia cells using bioengineering modified RNAs. The goal is to increase or decrease disease-relevant genes in astrocytes or microglia to potentially treat Alzheimer's disease and other neurodegenerative disorders.